Why should the hardness of screws be tested?

Jiaxing Xinhuan Technology Co., Ltd. is a Chinese manufacturer specialized in producing various types of fasteners, including machine screws, nuts, DIN7500 triangular thread series, and corrugated pins with various nuts. The factory's quality inspector, Master Han,conducts daily quality inspections and hardness tests on the products.

The main purpose of testing the hardness of screws is to evaluate their wear resistance and ensure their quality and performance. Hardness testing evaluates the strength and durability of screws by measuring their resistance to being pressed into their surfaces by hard objects. Screws with insufficient hardness are prone to deformation under loads, which affects their performance.